smythe



H. E. SMYTHE.

PREHEATING APPARATUS FOR FURNACES. APPLICATION FILED IAN. 23|19I9 I.,305A Y@ Patented May 27, 1919.

2 SHEETS-Sunni.

WITNESS INVENTOR.

H. E. SMYTHE.

PREHEATING APPARATUS FOR FURNACES. APPLICATION FILED IAN. 23. I9I9.

L305,1?6 Yatented May 27, 1919.

2 SHEETS-SHEET 2.

WlTNESS INVENTOR.

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pas sans nanna HORACE E. SMYTHE, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNORT0 THE S. R. SIVIYTIIE COMPANYQOF PITTSBURGH, PENNSYLVANIA, ACORPORATION OF WES-T VIRGINIA.

PREI-IEAIING APPARATUS FOR FURNACES.

Specification of Letters Patent. f

Patented May er, taie.

Application led January 23, 1919. ySerial N o. 272,645.

To all whom t may concern:

Be it known that I, HORACE E. SMYTHE, a citizen of the United States,residing at Pittsburgh, in the county of Allegheny and State ofPennsylvania, have inventedv new and usef-ul Improvements in PreheatingApparatus for Furnaces, of which the following is a specication.

My invention relates to apparatus for` preheating lair, gas, or both forfurnaces.

The principal object of this invention is to provide a preheating'apparatus for gaseous substance, as air and producer gas, for example,which has a minimum of horizontal surfaces for the reception of dust, 1amaximum heating and radiating surface, and improved facilities forcleaning dust from the flue surfaces and from the apparatus itself.

Referring to the accompanying drawings, Figure 1 is in part a plan andin part a horizontal section yconstructed in accordance with myinvention; Fig. 2, a vertical section on the line II-II, Fig. 1; andFig. 3, a vertical cross-section on the line III-III, Fig. 1.

On the drawing, 1 and 2 designate a pair of structures for preheatingair or gas preliminarily vto their introduction into la furnace of thereversing type. 3 and 4 are the necks leading to a reversing furnace,not shown, while 5 and 6 are passages leading to the stack 7 or to asupply of gas or air, according to the position of the reversing valves.As my invention lies entirely in the structures 1 .and 2, it is notnecessary to illustrate the usual reversing valves and the usualpassages by which these structures may be connected alternately to thestack and the air or gas supply.

As the structures 1 and 2 are alike, the structure 1 only will bedescribed, in which 8 is the bottom or licor, 9 the top or roof, and 10and 1l the sides. The structure 1 has a large chamber provided withseveral baffles or walls 12, 13, 14C, 15, 16, and 17. These bafflesexcept 17 start alternately from the sides 10 and 11 and stop somewhatshort of the opposite side, having a short-circuiting passage 13, sothat from the neck 3 to the passage 5 there is formed a tortuous orzigzag regenerator flue or passage. The baffle 17 is shown as separatedfrom the wall 11, so that the air or gas is divided on opposite sidesthereof, but this baffle may reach the wall l1 if the draft through thestructure 1 is suficiently strong. If necessary to increase the rate of.flow of fair or gas, the

"baffles 12 to 16, or some of them, may have the 'short-circuitingpassages 18 in their walls in line with the passages 19 through lwhichthe air or gas passes from one side of between consecutive baffles.

The sides of the structure 1 are provided with arched doors 21 builtopposite the sev* eral members kof the said tortuous flue or Fpassage sothat they may be opened for the purpose of cleaning the interior andremoving the accumulated dust, or other foreign matter carried insuspension. These doors may be of any type, such as swinging or sliding,but I have shown them to be composed of removable walls filling thearched doorways. 'Io clean the walls of this tortuous passage, I insertair or steam nozzles through the openings 22 in the roof 9 adjacent tothe faces of the several walls 12 to 17, and the rear wall 23. I do notconline myself to any specific location of the openings 22 as they maybe located adjacent to any portion of the said walls.

It will be understood, for example, that the hot waste gases from thefurnace may enter the structure 1 by way of the neck 3, whereby theexterior walls, the iioor, the roof, and both sides of the baflies 12 to17 will become highly heated, these gases iinally leaving through thepassage 5 on .their way to the stack 7; and that at the same time air orgas may pass through the passage 6 and the structure 2 and the neck 4,all preheated, to the said furnace. If o ne pair of structures be usedto preheat alr, another pair may be provided to preheat gas, the air andgas being brought in a manner well known, to the furnace cham- Y thestructure 2 to the stack. When the structure 2 becomes highly heatedagain, the flow of all the gaseous materials 1s again reversed. Thisalternation Vis continued while the furnace is in operation.

It is seen that my regenerator provides no horizontal surfaces for thecollection of dust, and the clogging and the insulating of the passages.I provide a maximum area of heating and radiating surfaces for the lsizeof the structures l and 2, which may have any practical capacity and anypractical'number of baliles, with or without the short-circuitingpassages 13. No tearing down of the structures, except at the doorways,where brick doors are used, is required for cleaning them. v

I claim:

1.- In a preheating structure for air, gas,

or the like, a chamber having an inlet and an outlet, and between thesame a series of bailes arising alternately from the sides of thechamber and stopping short of the opposite side thereof, and alsoextending from l the floor to the roof whereby a tortuous heating andradiating passage is provided between the said inlet and outlet and nohori- Copies of this patent may be obtained for zontal places for thelodgment of dust are provided.

2. In a preheating structure vfor air, gas,

or the like, a chamber having an inlet'and an outlet,V and between thesame a series ofV baffles arising alternately from the sides of thechamber and stopping short of the op-Y positeside thereof, Vand alsoextending from provided.

3. In a preheating structure for air, gas,

,Y or the like, a chamber having an inlet and an outlet, and between thesame a series of Ybaffles arising alternately from the Vsides of thechamber and stopping short of the opv posite side thereof, whereby atortuous heating and radiating passage is provided between the saidinlet and outlet, and shortcircuiting passages in some of the baffles.

Slgned at Pittsburgh, this 15th day of January, A. D. 1919.

HORACE E. sMYrHE.

ive cents each, by addressingtheY Commissione-r of Patents, Washingtonm.0.

